Theory of electronic transport through a triple quantum dot in the presence of magnetic field

Abstract

Theory of electronic transport through a triangular triple quantum dot subject to a perpendicular magnetic field is developed using a tight binding model. We show that magnetic field allows to engineer degeneracies in the triple quantum dot energy spectrum. The degeneracies lead to zero electronic transmission and sharp dips in the current whenever a pair of degenerate states lies between the chemical potential of the two leads. These dips can occur with a periodicity of one flux quantum if only two levels contribute to the current or with half flux quantum if the three levels of the triple dot contribute. The effect of strong bias voltage and different lead-to-dot connections on Aharonov-Bohm oscillations in the conductance is also discussed.

References in corpus (10)

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Cited by in corpus (9)

• Quantum phase transition in quantum dot trimers
• Spin selective Aharonov-Bohm oscillations in a lateral triple quantum dot
• Two-channel Kondo phases and frustration-induced transitions in triple quantum dots
• Dephasing-assisted transport in linear triple quantum dots
• Tunneling spectroscopy of spin-selective Aharonov-Bohm oscillations in a lateral triple quantum dot molecule
• Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
• Local magnetic moments and electronic transport in closed loop quantum dot systems: a case of quadruple quantum dot ring at and away from equilibrium
• Anomalous magnetotransport through reflection-symmetric artificial molecules
• Circular-polarization sensitive metamaterial based on triple quantum-dot molecules